Thermomechanical analysis of composite plates by viscoelastic damping patches

Speaker:
werhani, asma; Institut supérieur de l'automobile et des transports; France

Authors:
Werhani, A.; Institut supérieur de l'automobile et des transports; France

ID: ECNDT-0624-2018
Session: Thermography and Thermosonics 3
Room: H1
Date: 2018-06-14
Time: 13:50 - 14:10

Abstract
Heat transfer is the fundamental part of thermal engineering. This is the transfer of thermal energy due to the difference in spatial temperature. Several properties of materials such as thermal conductivity, specific heat, density, fluid viscosity, etc., modulate the heat transfer between two regions or systems at different temperatures. Advances in sensors, electronics and imaging devices have improved resolution and thermal sensitivity, enabling a wider range of applications such as material characterization, tensile strain studies, monitoring of in-line welding, thermal diffusivity measurements, etc.
Nowadays, this technique becomes more important in the vibratory field, for it is used for the detection of energy sources in beams with damping viscoelastic patches. To guarantee this, analytical, numerical and experimental studies have been done on beams covered by damping viscoelastic patches. During the experimental studies, an infrared thermal camera was used to capture the thermal image on the beam surfaces with the patch. Numerically, we have modeled an analytical model in order to locate zones with a strong heat zone, have done the FFT calculation under Matlab; we tried to validate this modelization experimentally. This study is important after the optimization of the positioning of the patches on the beams.
Keywords:
Infrared thermography, heat generation, thermal diffusivity, viscoelastic materials, damping viscoelastic patches.